Homework Answers
Highest energy conformation: syn-periplanar (θ = 0°, 360°), I & VII
Lowest energy conformation: anti- ( θ = 180° ), IV.
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2. Draw the energy diagram as a function of dihedral angle about the bond between C2...
XIII. Below is the potential energy diagram versus the dihedral angle of rotation for 2-methylbutane. Rotation...
XIII. Below is the potential energy diagram versus the
dihedral angle of rotation for 2-methylbutane. Rotation takes place
around the C2-C3 bond.
1. Draw alternate and clipped Newman projections in the space
provided. (6 points)
NOTE: the front carbon is carbon 2
2. Explain the difference in energy between conformers A and
B. (2 points)
111. A continuación aparece el diagrama de energía potencial versus el ángulo dihedral de rotacion para 2-metilbutano. La rotación se lleva a cabo alrededor del...
The following graph is based on the free energy for C2-C3 bond rotation in butane obtained...
The following graph is based on the free energy for C2-C3 bond rotation in butane obtained by using CheMagic Virtual Molecular Model Kit C2-C3 Bond of Butane 30 25 20 15 10 0 180 300 360 10 15 20 -25」 Dihedral Angle Draw Newman projection of butane around C2-C3 bond for 60, 180° and 300° dihedral angles below (2 pt@ 180° 300° Which of the three energy minimum do not match exactly with the corresponding staggered configuration ie, 60. 180°...
draw and label all relevang conformations. 2. Draw and label all relevant conformations (Newman projections) for 1-c...
draw and label all relevang conformations.
2. Draw and label all relevant conformations (Newman projections) for 1-chior 2,2,2-tribromoethane. Also, identify the dihedral angle between pertinent substituents. Finally, draw a graph of relative energy vs. dihedral angle for 2,2,2-tribromoethane. (14 points) 3. Draw the most stable conformations for cis-1,4-dimethylcyclohexane and trans-1,4 dimethylcyclohexane and explain which geometric isomer is lower in energy. (12 points) 4. Using the CA-Cs bond axis as a reference, draw and label all relevant conformations (Newman projections) for...
4. Using the CA-Cs bond axis as a reference, draw and label all relevant conformations (Newman...
4. Using the CA-Cs bond axis as a reference, draw and label all relevant conformations (Newman projections) for octane. Also, identify the dihedral angle between the pertinent substituents on C4 and C5. Finally, draw a graph of relative energy vs. dihedral angle for octane. (24 points)
10. a. Draw the Newman projections for the dihedral angles listed below for 2-methylpentane if you...
10. a. Draw the Newman projections for the dihedral angles listed below for 2-methylpentane if you sight down the 2-3 carbon bond (Assume that the least stable conformation corresponds to the 0° dihedral angle and assume that all rotations are counter clockwise) Using the energy values provided below calculate the total strain energy for each of the listed conformations. b. vii. 0 vili. 60° ix. 120 x. 180° xi. 240 xii. 300°
Draw Newman projections of 2, 3-dimethylbutane, looking down the C2 to C3 bond, in the most...
Draw Newman projections of 2, 3-dimethylbutane, looking down the C2 to C3 bond, in the most and least stable conformations. Label any important interactions.
Numbers 2-4 & Thhe other 1 & 2 (Straight Chain Angle). Cylic Angle 1.Propane. 109.5. -...
Numbers 2-4 & Thhe other 1 & 2
(Straight Chain Angle). Cylic Angle
1.Propane. 109.5. -
Butane. 109.5. 90
Pentane 109.5. 108
2. Newman projections: Draw the Newman projections of all of
the different energy levels and label them as staggered or eclipsed
in order from lowest energy to highest.
3. Cyclohexane: Draw both the chair and boat conformation of
1,4-dimethylcyclohexane with the methyl groups as cis and trans for
both conformations. Label your molecules for cis and trans. Tell...
Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy...
Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy conformations. Look down the indicated C2-C3 bond. ------- lowest energy highest energy
Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy...
Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy conformations. Look down the indicated C2-C3 bond. M lowest energy highest energy
Conformations of the 1 - bromopropane molecule: Draw the line-bond structure of the 1-bromopropane molecule (C_3...
Conformations of the 1 - bromopropane molecule: Draw the line-bond structure of the 1-bromopropane molecule (C_3 H_7 Br). You will draw your Newman projection based on the rotation of the bond between the first and second carbon atoms (C1-C2). Highlight this carbon-carbon bond by drawing the bond as a bold line. Next, use your model kit to build a model of the molecule. Draw the Newman projection for each dihedral angle at 60 degree interval (from 0 degree to 360...
XIII. Below is the potential energy diagram versus the
dihedral angle of rotation for 2-methylbutane. Rotation takes place
around the C2-C3 bond.
1. Draw alternate and clipped Newman projections in the space
provided. (6 points)
NOTE: the front carbon is carbon 2
2. Explain the difference in energy between conformers A and
B. (2 points)
111. A continuación aparece el diagrama de energía potencial versus el ángulo dihedral de rotacion para 2-metilbutano. La rotación se lleva a cabo alrededor del...
The following graph is based on the free energy for C2-C3 bond rotation in butane obtained by using CheMagic Virtual Molecular Model Kit C2-C3 Bond of Butane 30 25 20 15 10 0 180 300 360 10 15 20 -25」 Dihedral Angle Draw Newman projection of butane around C2-C3 bond for 60, 180° and 300° dihedral angles below (2 pt@ 180° 300° Which of the three energy minimum do not match exactly with the corresponding staggered configuration ie, 60. 180°...
draw and label all relevang conformations.
2. Draw and label all relevant conformations (Newman projections) for 1-chior 2,2,2-tribromoethane. Also, identify the dihedral angle between pertinent substituents. Finally, draw a graph of relative energy vs. dihedral angle for 2,2,2-tribromoethane. (14 points) 3. Draw the most stable conformations for cis-1,4-dimethylcyclohexane and trans-1,4 dimethylcyclohexane and explain which geometric isomer is lower in energy. (12 points) 4. Using the CA-Cs bond axis as a reference, draw and label all relevant conformations (Newman projections) for...
4. Using the CA-Cs bond axis as a reference, draw and label all relevant conformations (Newman projections) for octane. Also, identify the dihedral angle between the pertinent substituents on C4 and C5. Finally, draw a graph of relative energy vs. dihedral angle for octane. (24 points)
10. a. Draw the Newman projections for the dihedral angles listed below for 2-methylpentane if you sight down the 2-3 carbon bond (Assume that the least stable conformation corresponds to the 0° dihedral angle and assume that all rotations are counter clockwise) Using the energy values provided below calculate the total strain energy for each of the listed conformations. b. vii. 0 vili. 60° ix. 120 x. 180° xi. 240 xii. 300°
Draw Newman projections of 2, 3-dimethylbutane, looking down the C2 to C3 bond, in the most and least stable conformations. Label any important interactions.
Numbers 2-4 & Thhe other 1 & 2
(Straight Chain Angle). Cylic Angle
1.Propane. 109.5. -
Butane. 109.5. 90
Pentane 109.5. 108
2. Newman projections: Draw the Newman projections of all of
the different energy levels and label them as staggered or eclipsed
in order from lowest energy to highest.
3. Cyclohexane: Draw both the chair and boat conformation of
1,4-dimethylcyclohexane with the methyl groups as cis and trans for
both conformations. Label your molecules for cis and trans. Tell...
Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy conformations. Look down the indicated C2-C3 bond. ------- lowest energy highest energy
Convert the following bond-line structure to Newman projections that represents it lowest energy and highest energy conformations. Look down the indicated C2-C3 bond. M lowest energy highest energy
Conformations of the 1 - bromopropane molecule: Draw the line-bond structure of the 1-bromopropane molecule (C_3 H_7 Br). You will draw your Newman projection based on the rotation of the bond between the first and second carbon atoms (C1-C2). Highlight this carbon-carbon bond by drawing the bond as a bold line. Next, use your model kit to build a model of the molecule. Draw the Newman projection for each dihedral angle at 60 degree interval (from 0 degree to 360...
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